# File lib/authlogic/acts_as_authentic/base.rb, line 43
        def add_acts_as_authentic_module(mod, action = :append)
          modules = acts_as_authentic_modules
          case action
          when :append
            modules << mod
          when :prepend
            modules = [mod] + modules
          end
          modules.uniq!
          write_inheritable_attribute(:acts_as_authentic_modules, modules)
        end